Question

我的Java经验很少。我正在尝试强制将文档读取为UTF-8，但是试图将InputStream读取器挂钩到文档构建器时会遇到困难。

这是我到目前为止所拥有的：

import javax.xml.xpath.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;


if( pathToFile == null ) throw new Exception("You must supply a pathToFile parameter");

DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();

InputStreamReader in = new InputStreamReader( new FileInputStream( pathToFile ), "utf-8" );

BufferedReader reader = new BufferedReader ( new InputStreamReader ( in ) );

Element records = builder.parse(reader).getDocumentElement();

如果有人可以提供一些指示，请不胜感激

Answer 1

不要在InputStreamReader周围包裹InputStreamReader。（编辑另外，由于没有方法从Reader解析XML，您需要将阅读器包装在InputSource中）：

if( pathToFile == null )
    throw new Exception("You must supply a pathToFile parameter");

DocumentBuilder builder = DocumentBuilderFactory.newInstance()
    .newDocumentBuilder();

InputStreamReader in = new InputStreamReader(
    new FileInputStream( pathToFile ), "utf-8" );

BufferedReader reader = new BufferedReader ( in ); // CHANGED

InputSource input = new InputSource(reader);

Element records = builder.parse(input).getDocumentElement();

Answer 2

假设这是Groovy，你可以摆脱很多Java残余：

没试过，但是：

if( pathToFile == null ) throw new Exception("You must supply a pathToFile parameter");

Element records = new File( pathToFile ).withReader( "utf-8" ) { r ->
  DocumentBuilderFactory.newInstance().newDocumentBuilder().with { b ->
    b.parse( new InputSource( r ) ).documentElement
  }
}

应该有用......

使用DocumentBuilder解析InputStreamReader

2 个答案: